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Issue tracking for the archive.raspberrypi.org repo
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Mount.cifs kernel issue #315

Closed Tiemichael closed 1 year ago

Tiemichael commented 1 year ago

Background: I am using the most recent Raspberry Pi OS (64bit) (uname -a : Linux Raspberrypi 5.15.76-v8+ #1597 SMP PREEMPT Fri Nov 4 12:16:41 GMT 2022 aarch64 GNU/Linux) on a Raspberry 4B. When trying to mount an old Mediaserver (AcRyan:PlayOn) via the (only available) CIFS-protocol I fail, although mounting from Windows 10, Ubuntu 16.04, 18.04 and 20.04 works fine. (other newer devices mount without any problems). After intensive search I found 'Bug 215375 - Unable to mount cifs 1.0 shares' as the most likely culprit for my issue.

Questions: What is best way for me to overcome this issue? I read that downgrading the kernel is a possibility (downgrade kernel from 5.15.76 to 5.14.x or lower) - but where can I find the kernel? Is there an easy way to patch the kernel (as mentioned in the link above) ?

Thanks for your help!

XECDesign commented 1 year ago

@popcornmix Thoughts?

I'm guessing since it's an upstream issue, we wait and see if upstream want to resolve it or if they're okay with breaking it.

popcornmix commented 1 year ago

From reading the linked thread I think the commit required is cifs: fix regression in very old smb1 mounts That has been backported to v5.15.78, so just a bit newer than OP's kernel version.

@Tiemichael if you try using rpi-update kernel you should get a 5.15.84 kernel which includes the cifs regression fix. Can you test that and report back?

Note: backups are advised when using rpi-update (although currently rpi-update kernel is pretty close to stable).

Tiemichael commented 1 year ago

Where can I find the V5.15.78 kernel or the 'Git hash' required for rpi-update? I am not familiar with the numbering etc.

Thanks

popcornmix commented 1 year ago

The rpi-update tool (installed by default on RPiOS) allows test firmware/kernel to be installed. See: https://github.com/raspberrypi/rpi-update

Tiemichael commented 1 year ago

Where can I find the mentioned 'Git hash' required for rpi-update?

popcornmix commented 1 year ago

git hash is optional. Without a hash you get the latest (which is what you want).

Tiemichael commented 1 year ago

I successfully upgraded the kernel to V5.15.84-v8+, and I am able to mount the MediaServer!

Thank you for the quick help!

popcornmix commented 1 year ago

Thanks for confirming. There will be a stable (i.e. from apt) kernel update soon after new year, which will include this fix, so you should be fine. The apt upgrade will replace your rpi-update kernel, so nothing special should be needed from you when updated software.

Tiemichael commented 1 year ago

Thanks for the info!